BioWare's official Dragon Age wiki has been updated with information about the new Battlemage specialization being added in Awakening, as well as details and media for four new spells (Arcane Field, Elemental Chaos, Hand of Winter, and Repulsion Field) that the expansion pack will bring to the table. Here's the Battlemage blurb:
Some mages specialize in spells that permit them to engage in combat from afar. Battlemages, by contrast, prefer to wade into the fray alongside their blade-wielding companions, close enough to read the fear in their opponents' eyes. Their spells primarily concern personal preservation as well as control of the elements in their immediate surroundings.
Specialization bonus: +2 magic, minor combat health regeneration